ninebot ES4 controller component identification /repair

Hi all!
I have problem with ninebot ES4 controller.



Rear lights are very dim. So I traced the "L3" component, where seems to be big voltage drop. You can see it on next photo. Into L3 goes 4,9V but out comes only 2,9V. Current into rear light is 34mA. I have another two controllers which are normal. One normal has voltage drop on L3 1V and 75mA, second normal has 0,4V and 100mA. I also shorted this component and then current is 100mA.



So can it be some kind of fuse or thermal resistor? What can i use to replace it?
When I short that element out, rear light will work (100mA), but this is not maybe the best way to fix this issue.

It's an smt fuse, probably 1206 case. The L3 didn't obviously mean anything. Probably it got short circuit at some point.

Try a low 100s mA fuse. Probably best not to just bypass it in case it blew for a reason.

Thanks for answer! Yes, I`ll install new fuse there. Just it was strange for me that this fuse did now blow into infinite resistance, but still lets some current pass.